A primary advantage of teams over lone individuals when solving complex problems is their ability to expand the pool of available information, thereby enabling teams to reach higher quality solutions [1]}. The Hidden Profile task [2]} is a research task designed to mimic this decision-making scenario in which individuals hold private knowledge [3]}. In the task, some information is commonly held among all team members while each individual is also endowed with unique private information. Subjects do not know what information is shared or private. Information sharing is the central process through which teammates collectively solve the task [1]}; conversely, failing to share all available information causes them to come to incorrect conclusions. Information is distributed among teammates such that only by incorporating the private knowledge of each member do all teammates realize the optimal decision. Despite the importance of information sharing for team performance, past research has shown teams often deviate from the optimal use of information [2]}. Discussions tend to reinforce information held in common, rather than share information held uniquely by one group member [6]}. One reason for this is that individuals impute their own knowledge on others and hence assume that private information is already shared .
